AGI Aeronautical & General Instrument Limited

AGI Aeronautical & General Instrument Limited develops and produces the Gun Barrel Bore Gauge Measuring System for the inspection of various barrel calibres. Traditionally, ordnance routines generally require a combination of a visual inspection and physical measurement.


The BG10 Gun Barrel Bore Gauge System is an electro-mechanical measuring device for the high-speed measurement particularly of aircraft cannons, to ensure minimum operational aircraft turnaround time. BG10 Bore measuring range from 20 mm up to 60 mm. Measurements are taken at 16 pre-determined positions along each bore, which are then compared to pre-stored warning and rejection criteria. The actual measurements taken are displayed to the Operator on an LCD display and the measurements stored for future reference. The system will automatically provide a visual indication on the Hand Held Unit whether the barrel was acceptable, close to tolerance or rejected - all this to be undertaken in less than five minutes!


The BG20 Gun Barrel Bore Gauge System is an electro-mechanical measuring device that has been specifically designed to modernise and improve the inspection routines of large calibre barrels. BG20 Bore measuring range from 20 mm up to 155 mm. A two-point measuring head is supported in the barrel or chamber by a clear disk which facilitates the angular alignment of the head and the location of a suspected defect. The gauge may be introduced into the breech or muzzle end of the barrel and the measuring head located anywhere along its length. Any number of measurements may be taken and will be automatically stored under the barrel identification that is entered by the Operator. The measuring process can be effected in minutes. The operating software of the gauge provides the flexibility to automate existing in-service measurement routines or to accommodate specific defect investigations such as barrel bulging or ovaling.


AGICAM Visual Camera Inspection System allows identification of any defects such as removal of chromium plating, particularly in the forcing cone, or the leading edge of rifling, erosion, pitting, scoring and, in extreme circumstances, rifling that has been stripped from the barrel. Physical measurement is undertaken with a precision instrument, such as AGI’s Gun Barrel Bore Gauge System. Although separate systems have worked reasonably well, the introduction of safety systems and total quality management programmes require auditable records of the inspection to be made and retained for future reference.

Official site:



Address NIDES s.r.o.
Tuřanka 1222/115, Slatina
627 00 Brno
Czech republic
Phone(+420) 532 124 210
Reg No282 98 764
VAT NoCZ 282 98 764
Bank details3832272379/0800
Česká spořitelna
 The company NIDES Ltd. is registered in the Commercial Register maintained by the Regional Court in Brno, Section C, File No. 59557

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